| 摘要 |
A communication terminal device by which it is possible to reduce the communication expenses, and to improve operational performance. The communication terminal device includes a CODEC circuit which has communication ability of a V.34 mode, is formed by a hardware, and codes and decodes image data. The communication terminal device includes a CODEC program which has the communication ability equal to or lower than a V.17 mode, and codes and decodes image data. When reading an image by an image reading unit and coding the image data by the CODEC circuit, or when decoding a coded image data by the CODEC circuit and printing the image of the image data by an image printing unit, if a calling demand for the communication is generated, a main control unit waits for processing completion of coding or decoding by the CODEC circuit, and starts the calling of the communication.
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